Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mr. John Gregory Clark, DC

Individual provider Orthopedic Chiropractor · NPI 1386731677

Mr. John Gregory Clark, DC is registered under Chiropractic in Fresno, California. Graduated from Palmer College Chiropractic - West Sunnyvale in 1984, 42 years ago. Practices as a sole proprietor. Licensed in California.

Years since qualifying
42
Trained at
Palmer College Chiropractic - West Sunnyvale
Licensed in
CA
In the registry since
2006
What do these letters mean?
DC — Doctor of Chiropractic
A licensed chiropractor.

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Practice location Address checks out

7461 N 1st St Ste 103
Fresno, CA 93720-2850
Phone: (559) 226-3400
Fax: (559) 226-3963
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Orthopedic Chiropractor (primary) Taxonomy 111NX0800X · Licence 17061 (CA)

Record details

NPI number1386731677
Entity typeIndividual (Type 1)
GenderMale
Credentials DC
Sole proprietorYes
NPI enumeratedOctober 6, 2006
Last updated in NPPESJanuary 25, 2018

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCHIROPRACTIC
Medical schoolPALMER COLLEGE CHIROPRACTIC - WEST SUNNYVALE
Graduated 1984 (42 years in practice)
Accepts Medicare assignment Not indicated

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients71
Services billed 310 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

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